This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
譣 combines 言 (speech) with 僉, which likely contributes the sound. The exact historical meaning is uncertain, and the character is rare in modern Japanese.
With 言 (words) on the left and the complex 僉 on the right, 譣 looks like speech wrapped in something elaborate. Without a clear meaning, picture it as a mysterious, rare word lost in time.
For セン, imagine a centipede (セン) crawling over the intricate 僉 shape while words 言 try to describe it: centipede -> セン.